Warren Buffett updates his personal blog once a year, and it's read by thousands, if not millions. The title of his entry is the same every year: The Berkshire Hathaway Chairman's Letter to Shareholders. The 2003 version is up (PDF file).Each year after reading his letter, I ponder the same questions. One share of BRKa, or a down payment on a house? One share of BRKb, or a new laptop?